Ink cartridge



FIG. 1 is a perspective view of the front, left side and bottom of an ink cartridge showing my new design;

FIG. 2 is a perspective view of the rear, right side and top thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom view thereof.

The elements shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an ink cartridge, as shown and described. 